Chapter 85, Section 11A.
Bicycles; registration
No resident of any city which accepts this section by vote of its city council, or of any town which accepts this section by vote of the town, shall operate a bicycle within the limits thereof, unless such bicycle is registered under this section in such city or town and unless the registration plate or decal issued therefor is attached to such bicycle.

http://www.massbike.org/bikelaw/mass.htm#CONTENT

Does this mean I have to register in every town that I commute through? Meaning home town, destination tow, and all towns I travel through?